Switched from using a non-HTML-standard attribute "parentId" for marking children to using classes for marking children and placeholders. Added default options for these classes, as well as the classes used for the expand/collapse links.  Added a spinner (with default options) class that is used when a remote fetch is happening.
Switched from using a non-HTML-standard attribute "parentId" for marking children to using classes for marking children and placeholders. Added default options for these classes, as well as the classes used for the expand/collapse links.  Added a spinner (with default options) class that is used when a remote fetch is happening.

jdl/jquery-lazy-tree-table